Claude Helps Recover $395K in Bitcoin Locked Away for Years

The owner had spent eight weeks attempting to brute-force the password for their existing Blockchain.com wallet, testing nearly 3.5 trillion password combinations through the btcrecover service while using rented computing hardware.

A viral post on X claims that Claude “cracked” a forgotten Bitcoin wallet and helped recover 5 BTC from a user’s computer.

However, the situation was far less dramatic than the hype suggested. Anthropic’s AI only assisted the wallet owner in locating an old wallet file on their computer, which was later decrypted using a password the owner had already written down in a notebook.

User “cprkrn” shared the recovery story on Wednesday, describing it as “the most obvious opening ever” after realizing what had actually taken place.

The owner had spent eight weeks attempting to brute-force the password for their current Blockchain.com wallet, testing around 3.5 trillion password combinations through the btcrecover service while using rented computing hardware.

The recovery occurred after the user “dumped my whole college computer into Claude” as a final attempt, leading the AI assistant to locate an old wallet backup from December 2019 that had been encrypted with a password the user already had written in a notebook.

The old password successfully decrypted the backup file, which contained the same private keys tied to the current funds, as Bitcoin private keys do not change over time.

According to the user’s own disclosure on X, the password was “lol420fuckthePOLICE!*:)”. Around $15 was spent on Vast.ai GPUs during the unsuccessful brute-force attempts, while the eventual recovery was essentially achieved through a file search process.

Bitcoin Cryptography Remains Secure Despite Quantum Computing Concerns

For context, breaking Bitcoin’s underlying cryptography would require either a functional quantum computer capable of running Shor’s algorithm or the discovery of a flaw in elliptic-curve cryptography, something that has not emerged despite 16 years of public examination.

CoinDesk covered the expected timeline for that threat in its post-quantum security series earlier this year, with most researchers estimating that a cryptographically relevant quantum computer remains at least five to ten years away.

However, the user’s experience highlights another potential role for AI within crypto. Forgotten wallets from Bitcoin’s early years now carry significant value, and recovery tools such as btcrecover have long been used to help users test password variations against encrypted wallet files.

The main challenge has always been that most wallet recovery efforts require technical knowledge that the average person who lost Bitcoin typically does not possess.

That is where AI assistants can become useful. Rather than manually sorting through folders, timestamps, and backup files buried within years of stored drive data, wallet owners can rely on an LLM to detect patterns, reduce the search scope, and identify potential wallet files.

Millions of Bitcoin are believed to remain inaccessible because many owners lost passwords, hard drives, or recovery phrases during the cryptocurrency’s early years.

With Bitcoin trading near $79,000, a forgotten laptop stored in a closet may be holding assets worth six figures. Wallet data should be backed up carefully, recovery phrases are advised to be stored in secure physical locations rather than memory alone, and old hardware should be checked before being sold.